Xim is a free app that gives you the ability to create a temporary, ad hoc network between multiple phones so you can share photos with others—whether remote or in the same room, without relinquishing your personal mobile device. Friends can follow along synchronously on their own devices or browser interface, and can even control the pace of photos or pinch and zoom while you provide color commentary. With version 1.3 you can share your photos on the big screen via streaming media devices.